Results 1 to 10 of about 3,919 (69)

Randomization methods and cluster size in cluster randomized trials conducted in elementary and high schools [PDF]

Vojnosanitetski Pregled, 2022
Background/Aim. Randomization allows for study groups to be formed so that they are similar in all characteristics except outcomes. The aim of this study was to examine the frequency of randomization methods and their effect on achieving baseline balance
Pajčin Mirjana, Bukumirić Zoran, Tomašević Jelena, Ilić Aleksandra   +3 more
doaj   +1 more source

Spatial Stratification Method for the Sampling Design of LULC Classification Accuracy Assessment: A Case Study in Beijing, China

Remote Sensing, 2022
Spatial sampling design is important for accurately assessing land use and land cover (LULC) classification results from remote sensing data. Spatial stratification can dramatically improve spatial sampling efficiency by dividing the study area into ...
Shiwei Dong, Hui Guo, Ziyue Chen, Yuchun Pan, Bingbo Gao   +4 more
doaj   +1 more source

Density Peak Clustering Based on Relative Density under Progressive Allocation Strategy

Mathematical and Computational Applications, 2022
In traditional density peak clustering, when the density distribution of samples in a dataset is uneven, the density peak points are often concentrated in the region with dense sample distribution, which is easy to affect clustering accuracy.
Yongli Liu, Congcong Zhao, Hao Chao
doaj   +1 more source

Two-Stage Optimization Methods to Solve the DNA-Sample Allocation Problem

Mathematics, 2022
This paper deals with new methods capable of solving the optimization problem concerning the allocation of DNA samples in plates in order to carry out the DNA sequencing with the Sanger technique.
Diego Noceda-Davila, Silvia Lorenzo-Freire, Luisa Carpente   +2 more
doaj   +1 more source

Deep Reinforcement Learning-Based Power Allocation for Minimizing Age of Information and Energy Consumption in Multi-Input Multi-Output and Non-Orthogonal Multiple Access Internet of Things Systems

Sensors, 2023
Multi-input multi-output and non-orthogonal multiple access (MIMO-NOMA) Internet-of-Things (IoT) systems can improve channel capacity and spectrum efficiency distinctly to support real-time applications.
Qiong Wu, Zheng Zhang, Hongbiao Zhu, Pingyi Fan, Qiang Fan, Huiling Zhu, Jiangzhou Wang   +6 more
doaj   +1 more source

Research on an allocation model for food safety evaluation sampling based on the AHP-CRITIC method

Zhongguo shipin weisheng zazhi, 2023
ObjectiveThe aim of this study was to establish a scientific and reasonable estimation and allocation model for food safety evaluation.MethodsA statistical method was used to estimate the total number of samples for evaluative sampling， a sample size ...
LYU Ruiying, ZHAO Danxia, SHI Jian, LIANG Zupei, CHEN Jingxin, ZHANG Yan, RANG Yifeng, LIU Hui, LIU Chunhong   +8 more
doaj   +1 more source

Multivariate Boundaries of a Self Representing Stratum of Large Units in Agricultural Survey Design

Survey Research Methods, 2012
In business surveys in general, and in multipurpose agricultural surveys in particular, the problem of designing a sample from a list frame usually consists of two different aspects.
Roberto Benedetti, Federica Piersimoni
doaj   +1 more source

Using information from network meta-analyses to optimize the power and sample allocation of a subsequent trial with a new treatment

BMC Medical Research Methodology, 2022
Background A critical step in trial design is determining the sample size and sample allocation to ensure the proposed study has sufficient power to test the hypothesis of interest: superiority, equivalence, or non-inferiority.
Dapeng Hu, Chong Wang, Fangshu Ye, Annette M. O’Connor   +3 more
doaj   +1 more source

Exact Power and Sample Size Calculations for the Two One-Sided Tests of Equivalence. [PDF]

PLoS ONE, 2016
Equivalent testing has been strongly recommended for demonstrating the comparability of treatment effects in a wide variety of research fields including medical studies.
Gwowen Shieh
doaj   +1 more source

The Dark Side of Firm Diversity: An Empirical Examination of the Impact of Firm Diversity on Resource Allocation Efficiency in Multidivisional Firms

Istanbul Business Research, 2022
There is a renewed debate about whether multidivisional firms allocate resources efficiently across their divisions. This paper contributes to the literature on this debate by developing and testing a conceptual framework that links resource allocation ...
Mehmet Nasih Tağ
doaj   +1 more source